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		Manual Sawing - Course: Technique for manual working of materials. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 31 p.)
			(introduction...)
			Introduction
			Instruction example 4.1. Spacers and pin drifts
			Instruction example 4.2. Stands and supports
			Instruction example 4.5. Container
			Instruction example 4.4. Vee-shaped attachment
			Instruction example 4.5. Steel square
			Instruction example 4.6. Angle-steel frame table
			Instruction example 4.7. Wall-shelf bracket

Instruction example 4.5. Container

To practise mitre cuts on tubes and sheets of steel or light metal to specified size.

Material

- Steel or aluminium tube
45 dia. x 100 mm long
(wall thickness 2.5 mm).
- Steel sheet or aluminium sheet
Thickness: 4 mm
Width: 70 mm
Length: 70 mm.

Figure

Hand tools

Steel scriber, mark-out punch, engineers’ hammer, dividers, hand hacksaw, smooth-cut file 200 mm (half-round).

Measuring and testing tools

Steel measuring tool, protractor, try square.

Accessories

Vice, Vee-shaped attachment to suit tube diameter, surface plate, cutting oil.

Required previous knowledge

Reading of drawings, measuring and testing, scribing and prick-punching.

Sequence of operations

Comments

1. Arrange the working place, prepare the working materials.

- Check for completeness.

2. Clamp steel tube horizontally in vice using Vee-shaped attachment, scribe one end face with protractor
(45° setting) and steel scriber.

- Part (1)

3. File guiding kerf and saw off tube in one pass, remove burrs (inside and outside).

- Provide saw blade with cutting oil.

4. Scribe 100 mm length and saw off other face end with straight cut (check with try square), remove burrs*

5. Prick-punch sheet at centre, use punch mark as supporting point for dividers and draw circle of 68 diameter. Use same setting of dividers to mark step by step the six points on the circle, connect such points.

- Part (2)

6. Clamp sheet vertically in vice and saw at scribed line, remove burrs.

- Use small starting-cut sawing angle!

7. Final inspection.

- Dimensions and straightness of cut.

Completion

Glue, solder or weld tube onto metal sheet.

Container

Sequence of operations	Comments
1. Arrange the working place, prepare the working materials.	- Check for completeness.
2. Clamp steel tube horizontally in vice using Vee-shaped attachment, scribe one end face with protractor (45° setting) and steel scriber.	- Part (1)
3. File guiding kerf and saw off tube in one pass, remove burrs (inside and outside).	- Provide saw blade with cutting oil.
4. Scribe 100 mm length and saw off other face end with straight cut (check with try square), remove burrs*
5. Prick-punch sheet at centre, use punch mark as supporting point for dividers and draw circle of 68 diameter. Use same setting of dividers to mark step by step the six points on the circle, connect such points.	- Part (2)
6. Clamp sheet vertically in vice and saw at scribed line, remove burrs.	- Use small starting-cut sawing angle!
7. Final inspection.	- Dimensions and straightness of cut.